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Wind Turbine Installation Vessel
A wind turbine installation vessel (WTIV) is a vessel specifically designed for the installation of offshore wind turbines. There were 16 vessels in 2020. Most are self-elevating like jackup rigs. To enable quick relocation in the wind farm it is self-propelled. It also has a slender ship shaped hull to achieve a quick turnaround time with the vessel carrying several foundations or wind turbines each time. Azimuth thrusters are used to position the vessel during jack-up operations. Some vessels use the thrusters in dynamic positioning (without jacking up) to keep the vibrating pile driver steady when installing foundations. Some may carry 5 modern wind turbines, and lift 700 tonnes 125 meters above deck. Some WTIV use biodegradable hydraulic fluids to minimize ecosystem impact during leaks. A vessel can cost $335 million, or $220,000 per day. A 3-year leasing may cost €90 million. The fleet of 16 vessels are scheduled to expand to 23 vessels by 2023, of which 7 can handle the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TIV Resolution Raised (rotated)
Tiv or TIV may refer to: * Tendency for Interpersonal Victimhood, a recently proposed personality disorder * Tiv people, an ethnic nation in West Africa * Tiv language, a Southern Bantoid language * Time-invariant system * Tornado Intercept Vehicle * Trivalent influenza vaccine * Turbine installation vessel * T-IV mine, a Soviet anti-tank mine * Fokker T.IV, a Dutch torpedo bomber/maritime reconnaissance floatplane * Tivat Airport, by IATA airport code * Total insurable value, a value of property, inventory, equipment, and business income covered in an insurance policy People with the name * Tiv (illustrator) Tiv is a South Korean female illustrator and manga artist born in Seoul. She is a Korea University graduate. Starting in 2005, she became a freelancer illustrator and debuted as manga artist with ''Annyeong!''. In 2010, she moved her main activi ..., a female South Korean illustrator who currently lives in Japan. * Tiv, an ethnic group in Nigeria, live in the central-eastern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Offshore Wind Turbine
Offshore wind power or offshore wind energy is the generation of electricity through wind farms in bodies of water, usually at sea. There are higher wind speeds offshore than on land, so offshore farms generate more electricity per amount of capacity installed.Madsen & KrogsgaardOffshore Wind Power 2010 ''BTM Consult'', 22 November 2010. Retrieved: 22 November 2010. Offshore wind farms are also less controversial than those on land, as they have less impact on people and the landscape. Unlike the typical use of the term "offshore" in the marine industry, offshore wind power includes inshore water areas such as lakes, fjords and sheltered coastal areas as well as deeper-water areas. Most offshore wind farms employ fixed-foundation wind turbines in relatively shallow water. As of 2020, floating wind turbines for deeper waters were in the early phase of development and deployment. As of 2020, the total worldwide offshore wind power nameplate capacity was 35.3 gigawatt (GW). Unite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackup Rig
A jackup rig or a self-elevating unit is a type of mobile platform that consists of a buoyant hull fitted with a number of movable legs, capable of raising its hull over the surface of the sea. The buoyant hull enables transportation of the unit and all attached machinery to a desired location. Once on location the hull is raised to the required elevation above the sea surface supported by the sea bed. The legs of such units may be designed to penetrate the sea bed, may be fitted with enlarged sections or footings, or may be attached to a bottom mat. Generally jackup rigs are not self-propelled and rely on tugs or heavy lift ships for transportation. Jackup platforms are almost exclusively used as exploratory oil and gas drilling platforms and as offshore and wind farm service platforms. Jackup rigs can either be triangular in shape with three legs or square in shape with four legs. Jackup platforms have been the most popular and numerous of various mobile types in existence. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turnaround Time
Turnaround time (TAT) is the amount of time taken to complete a process or fulfill a request. The concept thus overlaps with lead time and can be contrasted with cycle time. Meaning in computing In computing, turnaround time is the total time taken between the submission of a program/process/thread/task (Linux) for execution and the return of the complete output to the customer/user. It may vary for various programming languages depending on the developer of the software or the program. Turnaround time may simply deal with the total time it takes for a program to provide the required output to the user after the program is started. Turnaround time is one of the metrics used to evaluate an operating system's scheduling algorithms. In case of batch systems, turnaround time will include time taken in forming batches, batch execution and printing results. With increasing computerization of analytical instruments the distinction between a computing context and a "non-computing" c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azimuth Thruster
An azimuth thruster is a configuration of marine propellers placed in pods that can be rotated to any horizontal angle (azimuth), making a rudder unnecessary. These give ships better maneuverability than a fixed propeller and rudder system. Types of azimuth thrusters There are two major variants, based on the location of the motor: # Mechanical transmission, which connects a motor inside the ship to the outboard unit by gearing. The motor may be diesel or diesel-electric. Depending on the shaft arrangement, mechanical azimuth thrusters are divided into L-drive and Z-drive. An L-drive thruster has a vertical input shaft and a horizontal output shaft with one right-angle gear. A Z-drive thruster has a horizontal input shaft, a vertical shaft in the rotating column and a horizontal output shaft, with two right-angle gears. # Electrical transmission, more commonly called pods, where an electric motor is fitted in the pod itself, connected directly to the propeller witho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Positioning
Dynamic positioning (DP) is a computer-controlled system to automatically maintain a vessel's position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors and gyrocompasses, provide information to the computer pertaining to the vessel's position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include ships and semi-submersible mobile offshore drilling units (MODU), oceanographic research vessels, cable layer ships and cruise ships. The computer program contains a mathematical model of the vessel that includes information pertaining to the wind and current drag of the vessel and the location of the thrusters. This knowledge, combined with the sensor information, allows the computer to calculate the required steering angle and thruster output for each thruster. This allows operations at sea where mooring or anchoring is not feasible ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biodegradation
Biodegradation is the breakdown of organic matter by microorganisms, such as bacteria and fungi. It is generally assumed to be a natural process, which differentiates it from composting. Composting is a human-driven process in which biodegradation occurs under a specific set of circumstances. The process of biodegradation is threefold: first an object undergoes biodeterioration, which is the mechanical weakening of its structure; then follows biofragmentation, which is the breakdown of materials by microorganisms; and finally assimilation, which is the incorporation of the old material into new cells. In practice, almost all chemical compounds and materials are subject to biodegradation, the key element being time. Things like vegetables may degrade within days, while glass and some plastics take many millennia to decompose. A standard for biodegradability used by the European Union is that greater than 90% of the original material must be converted into , water and minera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Fluid
A hydraulic fluid or hydraulic liquid is the medium by which power is transferred in hydraulic machinery. Common hydraulic fluids are based on mineral oil or water. Examples of equipment that might use hydraulic fluids are excavators and backhoes, hydraulic brakes, power steering systems, automatic transmissions, garbage trucks, aircraft flight control systems, lifts, and industrial machinery. Hydraulic systems like the ones mentioned above will work most efficiently if the hydraulic fluid used has zero compressibility. Functions and properties The primary function of a hydraulic fluid is to convey power. In use, however, there are other important functions of hydraulic fluid such as protection of the hydraulic machine components. The table below lists the major functions of a hydraulic fluid and the properties of a fluid that affect its ability to perform that function: Composition Base stock The original hydraulics fluid, dating back to the time of ancient Egy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquefied Natural Gas
Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state (at standard conditions for temperature and pressure). LNG is odorless, colorless, non-toxic and non-corrosive. Hazards include flammability after vaporization into a gaseous state, freezing and asphyxia. The liquefaction process involves removal of certain components, such as dust, acid gases, helium, water, and heavy hydrocarbons, which could cause difficulty downstream. The natural gas is then condensed into a liquid at close to atmospheric pressure by cooling it to approximately ; maximum transport pressure is set at around ( gauge pressure), which is about one-fourth times atmospheric pressure at sea level. The gas extracted from underground hydrocarbon deposits contains a varying m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merchant Marine Act Of 1920
The Merchant Marine Act of 1920 is a United States federal statute that provides for the promotion and maintenance of the American merchant marine. Among other purposes, the law regulates maritime commerce in U.S. waters and between U.S. ports. Section 27 of the Merchant Marine Act is known as the Jones Act and deals with cabotage ( coastwise trade). It requires that all goods transported by water between U.S. ports be carried on ships that have been constructed in the United States and that fly the U.S. flag, are owned by U.S. citizens, and are crewed by U.S. citizens and U.S. permanent residents.46. U.S.C. § 50101 et seq. (2006).Lin, Tom C.W.Americans, Almost and Forgotten 107 California Law Review (2019) The act was introduced by Senator Wesley Jones. The law also defines certain seaman's rights. Laws similar to the Jones Act date to the early days of the United States. In the First Congress, on September 1, 1789, Congress enacted Chapter XI, "An Act for Registering an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keppel Corporation
Keppel Corporation (also known as Keppel Corp) is a Singaporean conglomerate headquartered in Keppel Bay Tower, HarbourFront. The company consists of several affiliated businesses that specialises in offshore & marine, property, infrastructure and asset management businesses. The company was founded in 1968 as Keppel Shipyard at the Keppel Harbour situated in Tanjong Pagar before moving its operations to Jurong, where the company focused on offshore and marine activities. Notable Keppel subsidiaries include Keppel Offshore & Marine (world's largest oil rig builder) and Keppel Land (world's 2nd most sustainable diversified real estate developer). History 1900 to 1980s: Keppel Harbour, establishment of Keppel Shipyard and expansion The name of the company ''Keppel'' was derived from a British ship captain, Captain Henry Keppel, who discovered a natural, deepwater harbour (the Keppel Harbour) in Tanjong Pagar in 1848. The harbour was previously known as New Harbour until 1900 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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